Is there a graphical GUI builder?

[Laszlo Nagy]

> You have to think about your window differently - think about what
> you're putting where, rather than going visually "that looks about
> right" - but the reward is that it'll look right no matter where you
> run your app. As an added bonus, you don't need any sort of graphical
> builder; you can just write code directly in your editor.
Yes, but these are not mutually exclusive.  There can be (and there are) 
GUI tools that let you arrange your widgets with layouts and rules. In 
other words, using layouts and rules does not alone make it impossible 
to use a GUI builder.